SN4 ""

No	Pattern	Freq
1	[noun] made it difficult	63
2	[noun sg] made it difficult	39
3	[noun pl] made it difficult	19
4	[pron] made it difficult	13
5	[conj] made it difficult	11
6	[Wh det] made it difficult	8
7	[adj] made it difficult	7
8	which made it difficult	7
9	which made it difficult	7
10	[coord] made it difficult	6
11	and made it difficult	6
12	and made it difficult	6
13	that made it difficult	5
14	[pers pn] made it difficult	5
15	[that] made it difficult	5
16	[det] made it difficult	5
17	that made it difficult	5
18	made it [adv] difficult	46
19	made it [adv] difficult	46
20	made it more difficult	17
21	made it more difficult	17
22	made it very difficult	16
23	made it very difficult	16
24	made it extremely difficult	6
25	made it extremely difficult	6
26	made it difficult [prep]	51
27	made it difficult [prep]	51
28	made it difficult [verb]	50
29	made it difficult [to-vb]	50
30	made it difficult for	49